Problem:

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iPhone suddenly not receiving any email to a specific mail account

Solution:

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To pick how many days of recent mail to synchronize with an Exchange account in iPhone Mail:

1. Tap Settings on the iPhone Home screen.
2. Select Mail, Contacts, Calendars.
3. Tap the desired Exchange account under Accounts.
4. Now tap Mail Days to Sync.
5. Pick how many recent days' mail you want to be sent to iPhone Mail automatically.
6. Choose No Limit to synchronize all mail.

• Note that there is no way to see or search messages older than the synchronization limit.

You can also pick the folders whose new mail you want pushed to the device.